Hello Paul,

I use the 3M tape and any of the clear "gaffer" type waterproof tapes. I stick a length onto a cutting mat, then using a new scalpel blade, cut strips along the long length to the required width, then cross cut to the required length and peel from the mat.

Two things. 1. By peeling from the mat the initial strong tack/stick is reduced when you apply the strip to the model. Leave a long end that can be folded over to itself about 3 – 5 mm. This forms a handle to peel the tape off, else you'll be poking about with a point or blade tip and scratch the paint surface trying to lift the edge to get a grip.

2. Ensure that where you are using the tape it is well varnished/sealed etc. Matt of gloss, doesn't matter, but don't put to paint only. And a tip, remove the tape after use, do not leave on for days. [Same applies to masking tape – which is definitely not suitable for sealing over deck joints.]

I've used gaffer tapes of all colours on r/c yachts which, in a blow, are under water almost continuously when sailing, and it works. In fact, Halfords have a brand that sticks to wet surfaces and is water proof too. Cheaper tapes exist, but test first, some bleed their colour too.

Aye, Kimmo

magnets, squire…. you can get some very strong and small ones to exert a good hold-down force on the deck, which could sit on a thin neoprene "gasket"….? or some of that strip magnetic tape to provide a continuous flange magnetic seal…?

Ashley